Chapter 13: AC Measurements
MULTIPLE CHOICE
1. The ____ meter movement requires the conversion of AC to DC.
a.
moving-coil
c.
clamp-on
b.
iron-vane
d.
digital
2. The ____ meter is based on the principle that an AC current flowing in a conductor causes a magnetic
field to expand and collapse as the current increases and decreases in value.
a.
moving-coil
c.
clamp-on
b.
iron-vane
d.
digital
3. The meter must be connected in ____ with the circuit when measuring current. When measuring
voltage, the meter must always be connected in ____.
a.
series, parallel
c.
series-parallel, series
b.
parallel, series
d.
series-parallel, parallel
4. In an oscilloscope, the ____ provide(s) a sawtooth waveform as input to the horizontal deflection
amplifier.
a.
sweep generator
c.
power supplies
b.
vertical deflection amplifiers
d.
cathode-ray tube
5. In an oscilloscope, the ____ increase(s) the amplitude of the input voltage to the proper level for
deflection of the electron beam in the cathode-ray tube.
a.
sweep generator
b.
horizontal and vertical deflection amplifiers
c.
power supplies
d.
synchronizing circuits
6. In a frequency counter, the ____ converts the input signal to a waveshape and amplitude compatible
with the circuitry in the counter.
a.
signal conditioner
c.
time base
b.
main gate
d.
decade counter
7. In a frequency counter, the ____ passes the conditioned input signal to the counter circuit if a signal
from the time base is present at the same time.
a.
signal conditioner
c.
time base
b.
main gate
d.
decade counter
8. In a frequency counter, the ____ drives the gate-control circuit, using a signal compatible with the
signal being measured.
a.
signal conditioner
c.
time base
b.
display
d.
decade counter
9. In a frequency counter, the ____ keeps a running tally of all the pulses that pass through the main gate.
a.
signal conditioner
c.
time base
b.
display
d.
decade counter
10. In a frequency counter, the ____ acts as the synchronization center of the counter.
a.
display
c.
time base
b.
gate control
d.
signal conditioner
COMPLETION
1. The process of converting AC to DC is called ____________________.
2. A(n) ____________________ measures frequency by comparing a known frequency against an input
frequency.
3. The ____________________ in MultiSIM allows the user to produce a graph of a circuit’s frequency
response and is quite useful in analyzing filter circuits.
SHORT ANSWER
1. Identify the parts of a cathode-ray tube and explain their functions.
2. Describe how to use an oscilloscope to take a measurement.